ANATOMY

Detailed explanation-1: -Melatonin is a hormone that your brain produces in response to darkness. It helps with the timing of your circadian rhythms (24-hour internal clock) and with sleep. Being exposed to light at night can block melatonin production.

Detailed explanation-2: -“Your body produces melatonin naturally. It doesn’t make you sleep, but as melatonin levels rise in the evening it puts you into a state of quiet wakefulness that helps promote sleep, ” explains Johns Hopkins sleep expert Luis F. Buenaver, Ph.D., C.B.S.M.

Detailed explanation-3: -The primary physiological function of melatonin, whose secretion adjusts to night length, is to convey information concerning the daily cycle of light and darkness to body structures. This information is used for the organisation of functions, which respond to changes in the photoperiod such as the seasonal rhythms.